C-i closes/opens floats/ERT boxes etc. How about a M-C-i to close/open all floats? It would not be a toggle so that you don't get the inverse when some were opened others were closed ie it would yet you select "open all" "close all" "invert".
Apologies if this exists and I'm too dumb to have noticed! -- Laurie Savage Science @ Pascoe Vale Girls' College 03 9306 2544
